<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            width: 800px;
            height: 800px;
            position: relative;
            border-radius: 100px;
            overflow: hidden;
        }
        
        div:hover:after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            width: 100%;
            height: 100%;
            border: 10px solid rgba(0, 0, 0, 0.2);
            border-radius: 100px;
            box-sizing: border-box;
        }
    </style>
</head>

<body>
    <div>
        <img src="./R-C1.jpg" alt="">
    </div>
</body>

</html>